55331197 has 2 divisors, whose sum is σ = 55331198. Its totient is φ = 55331196.

The previous prime is 55331189. The next prime is 55331251. The reversal of 55331197 is 79113355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 5924356 = 7029^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 55331197 - 2³ = 55331189 is a prime.

It is a super-2 number, since 2×55331197² = 6123082722905618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55331137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665598 + 27665599.

It is an arithmetic number, because the mean of its divisors is an integer number (27665599).

Almost surely, 2^55331197 is an apocalyptic number.

It is an amenable number.

55331197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331197 is an equidigital number, since it uses as much as digits as its factorization.

55331197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175, while the sum is 34.

The square root of 55331197 is about 7438.4942696758. The cubic root of 55331197 is about 381.0570683065.

The spelling of 55331197 in words is "fifty-five million, three hundred thirty-one thousand, one hundred ninety-seven".